i never got this bit before, but in the cutscene before the first mission when Sam is in the chopper with Wilkes and Grim and she's putting the wires in Sam, there is a bit when Sam says "Don't like that" and Wilkes replies "i know, its for after we touch down" or something like that

i always thought Sam was talking about the stuff Grim was doing

when in actualy fact its cos Wilkes is holding a cigarette and FIsher doesnt like smoking.

i only got that today when i was watching the cut-scene again, and i'm glad i did